// 数组
package main

import "fmt"

func main() {
	var arr1 [5]int
	arr_len := len(arr1)

	for i := 0; i < arr_len; i++ {
		arr1[i] = i * 2
	}

	for i := 0; i < arr_len; i++ {
		fmt.Printf("Array at index %d is %d\n", i, arr1[i])
	}
}